Component Inspection

WARNING: This page is about a different car, the 2022 Hyundai Santa Fe. However, it is still accessible from the selected car via links, so may be relevant.

Inspection Condition	Inspection Procedure	Reference
Ignition "ON".	Refer to "Appropriate Service Information" and remove the necessary parts to access the control unit connected to the DCT L-CAN related communication circuit, such as TCU, shift lever, etc. Connect GDS to "Data Link Connector (DLC)". Disconnect unit connector one after the other. Using GDS to communicate with other units, such as TCU, shift lever, etc., to identify the fault-causing control unit. When a specific control unit is removed, does it communicate with the system using GDS?	-

Good

Fault might be intermittent and caused either by poor contact in connectors or wiring harness, or it has been repaired and control module memory is not cleared yet. Thoroughly check terminal of battery, all connectors (and connections) for looseness, bending, corrosion, contamination, deterioration, and/or damage.
Repair or replace as necessary and then go to "Verification of Vehicle Repair" procedure.

No Good

Carefully re-do this troubleshooting guide steps.
If problem still occurs, replace control unit that causing the fault and then go to "Verification of Vehicle Repair" procedure.